(Senast redigerad: tisdag, 29 augusti 2023, 17:39)
Short Definition
A dark
nebula, also known as an absorption nebula, is a form of interstellar cloud. It is so thick that it obscures visible wavelengths of light from things behind it, such
as reflection nebulae or background stars and emission. Interstellar dust
grains in molecular clouds' coldest, densest portions produce light
extinction.
Detailed Definition
Sometimes the light from the background stars or reflection
nebulas can be obscured by an interstellar cloud composed of gas, plasma and
galaxy dust, creating irregular shapes without defined boundaries. This
results in the formation of a black nebula or absorption nebula. The naked eye
has seen large dark nebulas, often seen as shadows
falling from the sky.
The development of stars and meteors is crucial in
the black nebula. Because of the difference in density, it is impossible to
form stars during condensation. Enormous molecular clouds often surround the black nebulas, while the small ones can be called Bok globulos.
Half of the world's famous Bang globules have been discovered to contain new
stars.
Etymology
mid-15c., nebule "a
cloud, mist," from Latin nebula,
plural nebulae, "mist, vapor, fog, smoke, exhalation,"
figuratively "darkness, obscurity," from PIE root *nebh- "cloud."
Sample
Sentence(s)
1. Later, when I looked to my left,
there was a black nebula. It had initially been an implacable cloud.
2. In general, the detections best suited the concept of a collision between a star and an interstellar nebula.
3. We've seen enough evidence to believe
our solar system began with a cold black nebula spinning in slow motion.
Translations
of Terms/Concepts into Partner Languages
French:nébuleuse sombre
German: dunkler Nebel
Italian: nebulosa oscura
Polish: ciemna mgławica
Swedish: mörk
nebulosa
Links to videos or articles: 1. Kurzgesagt - In a Nutwchell. 2017. The Last Light Before Eternal Darkness – White Dwarfs & Black Dwarfs. Retrieved on June 6, 2023 from https://www.youtube.com/watch?v=qsN1LglrX9s&ab_channel=Kurzgesagt%E2%80%93InaNutshell 2. Encyclopedia Britannica Contributors. February 23. 2023. Nebula. Retrieved June 15, 2023 from https://www.britannica.com/science/nebula
